Little Flipper I think is probably the most effective UK featherweight flipper running at the moment, although there are several others running at the moment too.

If you watch the vid below, youll see it throwing Pillow Torque and Ploughbot out the arena: http://www.youtube.com/watch?v=sUyweBaGYT0

Also of course the likes of Leos Hannibalito in the link Woody posted.

So pretty effective in featherweights